| 轮胎胶料共挤出成型过程的数值分析 |
| Numerical Simulation on Co-extrusion Molding Process for Ｔire Compounds |
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| DOI： |
| 中文关键词: 轮胎 胶料共挤出 入口流量比 牵引速度 数值模拟 |
| 英文关键词: tire compounds co-extrusion inflow flux ratio drawing velocity numerical simulation |
| 基金项目:高等学校博士学科点专项科研基金资助项目（20070299006）；江苏省六大人才高峰资助项目（07D019） |
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| 中文摘要: |
| 利用有限元方法对轮胎胶料（TWD40/FS10）共挤出成型过程进行三维数值模拟，分析入口体积流量比和牵引速度对口型出口处速度分布、界面偏移以及挤出胀大比的影响。结果表明:两熔体共挤出时，入口流量比对口型出口处速度分布、界面偏移影响较大，对挤出总胀大比影响较小；入口流量比接近于口型入口面积之比时，口型出口处速度分布较均匀，界面偏移量较小，且宽度方向界面总体偏向粘度较小的一侧；口型出口处垂直于挤出方向速度较大值出现在界面较小区域会引起界面局部尖角；牵引速度提高，沿挤出方向界面末端平直段逐渐增加，同时两熔体挤出胀大比迅速变小，口型出口处速度分布和沿宽度方向界面偏移量变化很小。 |
| 英文摘要: |
| A finite element method was used to simulate the three-dimensional co-extrusion molding process for tire compounds (TWD40/FS10).Simulated results such as the velocity distribution，interface excursion and die swell were obtained.The results indicated that the inflow flux ratio of TWD40 to FS10 had a great influence on the velocity distribution and interface excursion，and had a little influence on the die swell.When the inflow flux ratio was close to the area ratio of the inlet of the die，the velocity was well distributed，and the interface excursion was low，with the interface curve in width direction deflecting toward the lower viscosity side.The high velocity in the direction perpendi-cular to the extrusion direction resulted in local interface salient.With the increase of drawing velocity，the flat part length of the interface increased，and the die swell ratio decreased rapidly，while the velocity distribution and interface excursion at co-extrusion die exit changed little. |
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